`tanA/2tanB/2+tanB/2tanC/2+tanC/2tanA/2=1`

If A+B+C= pi/2 , show that : tanA tanB + tanB tanC + tanC tanA=1

If A+B+C= pi/2 , show that : tanA tanB + tanB tanC + tanC tanA=1

In triangle A B C , if |1 1 1cotA/2cotB/2cotC/2tanB/2+tanC/2tanB/2+tanA/2tanA/2+tanB/2| then the triangle must be a. equilateral b. isosceles c. obtuse angled d. none of these

In triangle A B C , if |1, 1, ,1,cotA/2,cotB/2,cotC/2,tanB/2+tanC/2,tanB/2+tanA/2,tanA/2 +tanB/2| then the triangle must be a. equilateral b. isosceles c. obtuse angled d. none of these

In a DeltaABC , if tanA/2=5/6 and tanB/2=20/37 then tanC/2=

In a DeltaABC , if tanA/2=5/6 and tanB/2=20/37 then tanC/2=

If A+B+C = pi //2 , then tanA tanB + tanB tanC+ tan A tan C=

In any triangle ABC , (tanA/2-tanB/2)/(tanA/2+tanB/2) is equal to

tanA +tanB + tanC = tanA tanB tanC if

tanA +tanB + tanC = tanA tanB tanC if